import axios from 'axios'
import config from './config'
import router from '../../router'
import qs from 'qs';

// options是axios里面的参数，withToken是token
export default function $axios (options, withToken) {
  return new Promise((resolve, reject) => {
    const instance = axios.create({
      baseURL: config.baseURL,
      headers: {
        ...config.headers,
        ...options.headers
      },
    })

    // request 拦截器
    instance.interceptors.request.use(
      config => {
        if ( config.method == 'GET' || config.method == 'get' ) {
            config.paramsSerializer = params => qs.stringify(params, {arrayFormat: 'repeat'})
        }
        // 如果没有token
        if (!withToken) {
          return config
        } else {
          //如果存在token
          let token = sessionStorage.getItem('token')
          config.headers['token'] = sessionStorage.getItem('token')
          token = null
          return config
        }
        // let currentURl = router.currentRoute.fullPath
        // if (currentURl.indexOf('seller') !== -1) {
        //   token = sessionStorage.getItem('token')
        // } else {
        //   let activityInfo = JSON.parse(sessionStorage.getItem('token'))
        //   let {
        //     weChatId
        //   } = activityInfo
        //   token = sessionStorage.getItem(`_token_${weChatId}`)
        // }
        // 把token放到请求里
      },
      error => {
        // 请求错误时
        console.log('request:', error)
        // 1. 判断请求超时
        if (error.code === 'ECONNABORTED' && error.message.indexOf('timeout') !== -1) {
          console.log('timeout请求超时')
          // return service.request(originalRequest);//再重复请求一次
        }
        // 2. 需要重定向到错误页面
        const errorInfo = error.response
        console.log(errorInfo)
        if (errorInfo) {
          // error =errorInfo.data  //页面那边catch的时候就能拿到详细的错误信息,看最下边的Promise.reject
          const errorStatus = errorInfo.status // 404 403 500 ...
          router.push({
            path: `/error/${errorStatus}`
          })
        }
        return Promise.reject(error) // 在调用的那边可以拿到(catch)你想返回的错误信息
      }
    )

    // response 拦截器
    instance.interceptors.response.use(
      response => {
        let data
        // IE9时response.data是undefined，因此需要使用response.request.responseText(Stringify后的字符串)
        if (response.data === undefined) {
          data = JSON.parse(response.request.responseText)
        } else {
          data = response.data
        }
        return data
      },
      err => {
        if (err && err.response) {
          switch (err.response.status) {
            case 400:
              err.message = '请求错误'
              break

            case 401:
              err.message = '未授权，请登录'
              this.$router.push('./login')
              break
            case 403:
              err.message = '拒绝访问'
              break

            case 404:
              err.message = `请求地址出错: ${err.response.config.url}`
              break

            case 408:
              err.message = '请求超时'
              break

            case 500:
              err.message = '服务器内部错误'
              break

            case 501:
              err.message = '服务未实现'
              break

            case 502:
              err.message = '网关错误'
              break

            case 503:
              err.message = '服务不可用'
              break

            case 504:
              err.message = '网关超时'
              break

            case 505:
              err.message = 'HTTP版本不受支持'
              break

            case 2000:
              alert('用户名或密码错误')
              break

            case 2002:
              alert('登录失败')
              break
            default:
          }
        }
        console.error(err)
        return Promise.reject(err) // 返回接口返回的错误信息
      }
    )

    // 请求处理
    instance(options).then(res => {
      resolve(res)
      return false
    }).catch(error => {
      reject(error)
    })
  })
}
